Picnic Spot: Triangle Park, Beacon HillPicnic Supplies: ABC Supermarket, 2500 Beacon Ave. S., with a pupuseria and taqueria inside. El Mexicano Saborico yogurt, fresa flavored; three pupusas con todo; total tab: $7.40. Walking It Out: Pupusas are to El Salvador what tacos are to Mexico, pizza is to Italy, tapas are to Spain, and fast food is to America: snack food, a way to ruin your dinner. Basically, they’re a thick tortilla made of masa de maiz (corn dough) filled with quesillo (Salvadorian cheese), chicharrones (fried pork), and/or frijoles (beans). The result is a bit like a cheese, bean, and pork pancake, which is way more of a gut bomb than it first appears. A proper pupuseria (pupusa stand) will hook you up with vinegar-soaked lettuce and carrots to dump on top along with a healthy dose of salsa. Pupuserias are as ubiquitous in El Salvador as Starbucks in Seattle. And they’re cheap — like, fifty cents a piece.At the ABC Supermarket on Beacon Hill, the pupusas are a little more expensive — about two bucks. But hey, this is America. Stuff costs more here. Like the rest of the neighborhood, the ABC Supermarket is a combination Southeast Asian and Latino store. Besides pupusas, there are a ton of snacks I haven’t seen outside of those regions of the world, much like the strawberry-flavored yogurt drink I used to wash down the dough, cheese, beans, and pork. And lastly, at the checkout line, there’s the small pleasure of listening to two people who are new to English communicate in English. Jefferson Park is apparently getting an overhaul but Triangle Park, just two blocks south of ABC, is a much more tranquil place for a picnic. Nobody was there for my pupusa eat-off, but that’s a rarity. It’s small but right in the center of the community. A flier says that a pinata party is planned for this weekend. Everybody’s invited. And, in an ode to the diversity of the community, the invitation is printed in English, Spanish, and Tagalog.